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Over current protection apparatus

a protection apparatus and overcurrent technology, applied in the direction of electrical apparatus, emergency protection arrangements for limiting excess voltage/current, power conversion systems, etc., can solve the problems of circuit or equipment damage, system may be difficult to operate normally, and unnecessary power supplied

Inactive Publication Date: 2015-09-29
GREEN POWERSET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The present invention is directed to an over-current protection apparatus capable of blocking the flow of over-current that may cause a system error as soon as the over-current is sensed.

Problems solved by technology

When the over-current continuously flows, unnecessary power may be supplied, or a switching device or other components may be maintained to be heated and thus be damaged.
Thus, fire may occur, a circuit or equipment may be damaged, and a system may be difficult to operate normally.

Method used

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Embodiment Construction

[0022]Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. While the present invention is shown and described in connection with exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention. Like reference numerals denote like elements throughout the drawings.

[0023]FIG. 1 is a block diagram of an over-current protection apparatus 10 according to an exemplary embodiment of the present invention.

[0024]Referring to FIG. 1, the over-current protection apparatus 10 includes a current sensor 110 that transforms input current into a voltage signal, and outputs the voltage signal, an over-current sensing unit 120 that is driven according to the voltage signal output from the current sensor 110, and an over-current determination unit 130 that determines whether over-current occurs, in response to an outp...

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Abstract

Provided is an over-current protection apparatus including a current sensor configured to transform input current into a voltage signal, and output the voltage signal; an over-current sensing unit driven according to the voltage signal output from the current sensor; and an over-current determination unit configured to generate a switching unit driving signal, the logic level of which is determined according to a duration of an output signal of the over-current sensing unit.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present invention relates to an electric system protection apparatus, and more particularly, to an over-current protection apparatus.[0003]2. Discussion of Related Art[0004]In general, a switching mode power supply employing pulse width modulation (PWM) is a device that transforms an input direct current (DC) voltage into a voltage having a square wave shape using a semiconductor device, e.g., a power metal-oxide-semiconductor field effect transistor (MOSFET), as a switch, and then obtains a controlled DC output voltage using a filter. The switching mode power supply controls the flow of current by using a switching processor of the semiconductor device, and is thus a high-efficient, high-durable, compact, and light device compared to a conventional linear type power supply.[0005]When over-current is sensed, the switching mode power supply may perform any of various control methods, e.g., control current not to continuously increase...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H02H3/00H02H3/08H02H3/087H02H9/02H02H3/093
CPCH02H3/08H02H3/081H02H3/087H02H3/093H02H9/02H02H7/10H02M1/32
Inventor HWANG, KYU MIN
Owner GREEN POWERSET